Problem How does sea-floor spreading add material to the ocean floor? Materials scissors metric ruler. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. This creates new ocean crust. a (6–8 can be in any order) 6. In the mid-1900s, scientists mapped the mid-ocean ridge using sonar. The data is from four companion digital models of the age, age uncertainty, spreading rates and spreading asymmetries of the world's ocean basins. Rocks on the seafloor on either side of a mid-ocean spreading ridge preserve a record of the Earth's magnetic field over time. On the basis of Tharp's efforts and other new discoveries about the deep-ocean floor, Hess postulated that molten material from Earth's mantle continuously wells up along the crests of the mid-ocean ridges that wind for nearly 80,000 km. During the lab, perform from time to time a screen capture and print out the image for your notebook. mid-ocean ridges 10. Paleomagnetism: Strong evidence of Seafloor Spreading and Plate Tectonics. Displaying all worksheets related to - Seafloor Spreading. Seafloor spreading is most dynamic along giant underwater mountain ranges known as mid-ocean ridges. View Lab Report - Unit 1- Seafloor Spreading and Uniformitarianism Laboratory. NAME DATE INSTRUCTOR PERIOD PARTNER UNIT 4: Plate Tectonics and Earth's Interior LAB 4-7= GONTINENTAL DRIFT INTRODUCTION: Since the early 19th Century, people have thought about the jigsaw fit of the continents. Berdasarkan data-data topografi, sedimen dan paleomagnetisme bawah laut (lihat posting yang lalu), diajukanlah teori baru yaitu seafloor spreading. Result detail. The ocean plates spread and grow in opposite directions, so rocks that are equidistance from the center have the same magnetic polarity and age. Submit your work via Bb. You can build a model to help understand this process. Seafloor spreading processes create new oceanic crust at mid-ocean ridges and destroy older crust at deep sea trenches. Virtual Density Lab. Each student will need to view on their own computer. The magnetism of mid-ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century. pdf] - Read File Online - Report Abuse. Seafloor Spreading Introduction: Along the entire length of Earth’s mid-ocean ridge, the sea floor is spreading. Paleomagnetism: Strong evidence of Seafloor Spreading and Plate Tectonics. Materials Needed: 2 different colored markers. Although this process takes place constantly, it is difficult to observe directly. The moon would be waning when it is appears to be getting smaller, when it is "losing" light, therefore we don't see it as much, until it is a new moon. It is located underneath the sea at divergent plate boundaries. Magnetic Striping and Seafloor Spreading The discovery of magnetic stripes in oceanic crust and how this supports Wegener's Theory of Continental Drift or, as we. Science Textbook. The newly-formed crust pushes the older crust apart causing the sea-floor to spread. volcanic islands 7. Sea Floor Spreading Worksheet Use the figure above to answer the following questions. How Do Rocks Respond to Stress? How Are Mountains Related to Plate Tectonics. In the following activity, you will build a model to help understand this process. Showing top 8 worksheets in the category - Seafloor Spreading. In the case of divergent plate boundaries, where plates are spreading away from each other, the rate of plate movement plays an important role in determini. cut paper along. These plates "ride" on the hot plastic upper mantle called the asthenosphere. Sediment Deposition Supports Seafloor Spreading — Student Guide 3 What To Do 1 The gray circles on the map represent drill sites where the JOIDES Resolution collected sediment cores from the ocean floor during Ocean Drilling Program (ODP) expedition 168 in 1996. Measuring Volume. The East Pacific Rise is a mid-ocean ridge that runs through the eastern Pacific Ocean and separates the Pacific plate from the North American. redhookcentralschools. Atlantic Sea-Floor Spreading Activity 2. These student-oriented labs are designed to explore science through a stimu-lating yet simple and relaxed approach to each. Go to Google Classroom and complete the lesson. The state run lab is leading the way in the fight against the global pandemic. If sea-floor spreading operates, the youngest oceanic crust should be found at the ridges and progressively older crust should be found in moving away from the ridges towards the continents. Didn’t advocate too strongly, for fear of ruining his career. If your teaching Seafloor Spreading, this is an EASY and FUN lab to do with your students!! This lab is a great way to get students actively engaged in hands-on, cooperative learning! After following the EASY step-by-step instructions, students answer questions (analyze & conclude worksheet at. 3 (B) Use models to represent aspects of the natural world such as an atom, a molecule, space, or a geologic feature. When Alfred Wegner described this process it was rejected due to lack of evidence. The age, spreading rate, and asymmetry at each grid node are determined by linear interpolation between adjacent seafloor isochrons in the direction of spreading. These age data also allow the rate of seafloor spreading to be. 1/Reading 2. Subduction and Plate Tectonics - lessons on seafloor spreading. MAGMA FROM THE MANTLE THAT RELEASE LAVA TO THE SEA FLOOR. rift valleys 11. The diagram on the next page represents a section of the ocean floor in the North Atlantic. A part of the ma. The slowest spreading rate is the Southwest Indian Ridge, between the African plate and the Antarctic plate, which is spreading at 1. Spreading Started m. In 1960 Harry Hess, in the words of Robert Fisher, “put it all together. WTT, Students reviewed sea floor spreading. Color the areas indicated on the two strips with colored pencils. UnN Universe, Galaxies, and Solar System. For more information on your notebook set and this lab please see the Notebook Setup Tab (*hint hint wink wink nod nod*)above. Seafloor spreading can inevitably create new oceans. The rocks on the seafloor show the history of the magnetic changes in the earth. They also look at how volcanoes and earthquakes are explained by tectonic plate movement, and how engineers use this information. Shade them with a light. 132 – 133: Plate Tectonics Theory. Lab Worksheet - Plate Tectonics page 1. 1 History of study. Mid-ocean ridges, also called seafloor-spreading centers, are long, linear volcanic ridges formed where the seafloor cracks into 2 plates of oceanic crust that spread away from each other. • Explain the significance of magnetic patterns on the seafloor. Find Sea-floor Spreading lesson plans and worksheets. Whats people lookup in this blog: Mapping The Ocean Floor Answer Key; Mapping The Ocean Floor Lab Answer Key; Mapping The Ocean Floor Worksheet Answer Key; Mapping The Ocean Floor Worksheet Page 1. Seafloor spreading helps explain continental drift in the theory of plate tectonics. When the magnetic pole switches, so do the stripes. • Explain the significance of magnetic patterns on the seafloor. The pattern of sea floor spreading can be observed by studying the magnetic field of the rock on the sea floor. Molten rock pushes up from the asthenosphere and pushes the plates apart at the mid-ocean ridge. where the sea floor is being spread apart and new ocean crust forms. Among them is Texas, which is allowing nonessential businesses to start reopening. Seafloor Spreading Tutorial sea floor spreading slip slide collide Sea Floor Spreading Sea Floor Sp/edpuzzle. This site from the University Corporation for Atmospheric Research (UCAR) offers an interactive simulation that shows how magnetic stripes on the ocean bottom can reveal the age of the material and reveal plate motion. mountain belts, and volcanoes, the shape of the sea floor, and the distribution of rocks and fossils can be seen. Here is how sea-floor spreading works. You can build a model to help understand this process. Even though the students do not directly observe the magnets, they use the information to infer tectonic processes present at the mid-ocean ridges and calculate the spreading rates for two different ridges. Go go Google classroom and complete the lesson. When Earth's geomagnetic field undergoes a reversal, the change in polarity is recorded in the magma, which contributes to the alternating pattern of magnetic striping on the seafloor. MEMORY METER. QUIZ #2 (Covers Labs 1 and 2 & Sea Floor Topography from lecture). Seafloor spreading is the creation of new seafloor or new oceanic crust 5. At the Mid-Atlantic Ridge (and other places), material from the upper mantle rises through the faults between oceanic plates. Seafloor Spreading Hypothesis. The rocks closer to the ridge were younger than rocks farther away from the ridge. Read through the information at the top of the page. Samples collected from the ocean floor show that the age of oceanic crust increases with distance from the spreading centre—important evidence in favour of this process. Go Further The fastest spreading rate is the northern part of the Pacific plate, which is spreading at approximately 15. Tue November 8 - Sea-Floor Spreading Notes p. Showing top 8 worksheets in the category - Seafloor Spreading. Get Free Access See Review. Sea-floor spreading is part of the plate tectonics theory. The two sides of the ridge are moving in opposite directions leaving a rift that is the site of submarine volcanic eruptions. You might want to save this for your. Sea-Floor Spreading Lab INTRODUCTION In the late 1950s, considerable research was conducted to find a means of detecting large steel objects beneath the ocean surface (submarines). Seafloor Spreading Section Objectives • Summarize the evidence that led to the discovery of seafloor spreading. Video: Making of the Fittest: Natural Selection & Adaptation. Modeling Sea Floor Spreading Lab (pdf or google doc) Sea Floor Spreading Article (pdf or google doc) Pangea Puzzle Playdough Plate Tectonics Activity (pdf or google doc) Layers of the Earth & Plate Tectonics Homework Packet - collected February 12th, 2013 Guided Reading: Layers of the Earth (pdf or google doc) Guided Reading: Continental Drift. According to plate tectonics, the outer part of the Earth is a layer of rock about 100 kilometers thick. Page 92-Pangaea Lab puzzle and lab questions. As each new layer emerges, the prior layer is pushed away from the ridge If the space between the tables is the ridge and the craft sticks represent the magma, then which sticks represent the oldest portion and which sticks. Scores of schools have returned portions of housing and dining fees, but few if any have agreed to return any share of tuition. , 1987, Mapping the Ocean Floor in Down to Earth, AIMS. Chapter 10 Virtual Lab. Use the Unix Tutorial to learn basic commands and how to maneuver around a Unix platform For Live Oak Hall, Classroom #1221: - Login into the Desktop computers (use your Moodle login and password) - Choose the “Oracle VM Virtual Box” - Select “Ubuntu” - When prompted, choose Login: Student. Simple lab and modeling activities can help your students understand the movements of the Earth's crust. Stations answer sheet (see me for the stations sheets). To demonstrate this idea, you will now complete Vernier. Interior of the earth activity: Activity #1. This interactive activity is simple to prepare and to execute and allows the students to understand seafloor spreading and the position of newer rock and older rock in relation to the mid-oceanic ridge. On the basis of Tharp’s efforts and other new discoveries about the deep-ocean floor, Hess postulated that molten material from Earth’s mantle continuously wells up along the crests of the mid-ocean ridges that wind for nearly 80,000 km. Use this for #8 seafloor spreading in plate tectonics. Virtual Lab The Effects of Carbon Dioxide and Light on Photosynthesis Presentations Food Web Balance 8. Tuzo said that Earth’s crust, or lithosphere, was divided into large, rigid pieces called plates. Age of rocks the 1st evidence of seafloor spreading Convergent plate boundaries the sites where 2 plates are moving toward each other and the motion is accommodated by one plate sliding beneath the other. Procedure: Push 2 desks so their edges are. The process is continuous because forces cause opposite sides of the midocean ridge to constantly move apart, making new room for the process to repeat. If finished, play matching game. Here, magma rises up from. This creates new ocean crust. pdf FREE PDF DOWNLOAD ES 106 Laboratory # 4 - Western Oregon University. The earth does not get bigger. [Filename: GES. All models. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Distinguish among types of plate tectonic settings produced by plates diverging, converging, and sliding past each other. You will develop skills in reading, writing, laboratory-work, oral presentations, and evaluating the scientific importance behind the study of the Earth. National Standards Addressed Earth and Space Science, Grades 5-8: The solid earth is layered with a lithosphere; hot, convecting mantle; and dense, metallic core. (The virtual lab is Flash. Magnetic stripes on the ocean floor: a lab simulation Learning objectives: the Earth’s magnetic field has ‘flipped’ (the N pole becoming the S pole, and vice versa) many times over geological time ; as tectonic plates move apart, new rock is formed and locks in the direction of the magnetic field at the time. The slowest spreading rate is the Southwest Indian Ridge, between the African plate and the Antarctic plate, which is spreading at 1. New crust is mainly created at plate boundaries in mid-ocean, where the SEA-FLOOR IS SPREADING. Using the foldables, explain what seafloor spreading is, where it occurs, and what it causes (use the passage!). deep-sea trenches 8. pdf: File Size: 195 kb: File Type: pdf:. One of our standards states that students should model the features of the ocean floor. Using the magnetic anomaly patterns in the Aragorn Ocean, determine when sea floor spreading started to form the Aragorn Ocean crust (remember, spreading is not actively going on now but it was at one time). plate_boundary_activity. As the sea floor spreads, the Earth's crust is changing and moving the continents as well. Magnetic Reversals and Seafloor Spreading--video; What happens when Earth's magnetic field reverses?--video; Plate Tectonics--short video from BioInteractive that helps explain how convection currents move the plates. Earth History Lab - Duration: 12:20. Pelagic and Neritic Sediment Distribution Distribution controlled by •Proximity to sources of lithogenous sediments •Productivity of microscopic marine organisms •Depth of water •Sea floor features Pelagic and Neritic Sediment. • Lithosphere with new oceanic crust is formed at MOR, then spreads laterally as if on conveyor belt. Subduction and Plate Tectonics - lessons on seafloor spreading. Plate Tectonic Stations. Sea-floor spreading is part of the plate tectonics theory. icebreaker Healy found evidence from water samples and seafloor rocks of far more volcanism and hydrothermal venting than was predicted on the ultra-slow-spreading Gakkel Ridge in the Arctic Ocean. Mid-ocean ridges, which contribute to the process of sea-floor spreading, form as a result of _____. Drilled Rock Samples-shows the age of the rocks 3. They will also model sea floor spreading at a spreading center such as the Mid-Atlantic Ridge. Modeling Sea-Floor Spreading Lab Record Sheet Problem How does sea-floor spreading add material to the ocean floor? Skills Focus making models Materials scissors colored marker metric ruler 2 sheets of unlined paper Procedure Draw stripes across one sheet of paper, parallel to the short sides of the paper. This is made to be done on Excel or similar program, but you can do it by hand. As the hot lava cools it creates a ridge. Here, magma rises up from. Iceland; Azores. When your teams and organizations are distributed, experimentation becomes the primary tool to aid our change navigation. As magma starts to harden into rock, iron-rich minerals solidify first. com Chapter 5 Exploring The Ocean People Have Stud -> Source : slideplayer. What has been the average rate and direction of seafloor spreading in cm per year (only) west of the Juan de Fuca Ridge, from B to A show your work 3. (*)You have two days to complete this lab on Mapping the Ocean Floor. What has been the average rate and direction of seafloor spreading in cm per year (cm/yr) east of the Juan de Fuca Ridge, from B to C Show your work. They will make you ♥ Physics. 2 (4 Words) Due: 12/9 12/6: Section 3. The distance between us and them: Sea floor spreading in the Atlantic Ocean 1. If the ridge is slowly growing, it shows a steep and irregular topography, and is narrow. Click on the distance tab in the upper left. About Me; Sea Floor Spreading Lab. 1 Unit 3 Oceans Block(s)/Period(s): 1 2 3 4. These isochrons geomagnetic polarity time scale. If the ridge is wider, it produces slopes. re: how to reach standard if 2/4 or lower. >At the Juan de Fuca Ridge the spreading process creates an average width of 6m of new crust every hundred years. The pattern of sea floor spreading can be observed by studying the magnetic field of the rock on the sea floor. Sea floor spreading occurs at the mid-ocean ridge where two plates are moving away from each other. Essentia offers the option in response to patients, who liked the convenience and safety of the virtual visits but wanted reassurance from the heartbeat and ultrasound monitoring, she said. Virtual Earthquake (CL) eField Trip to Hawaiian Isls. Birdley "Continental Drift. Displaying all worksheets related to - Seafloor Ages. Seafloor spreading can inevitably create new oceans. Note that the seismically detected LAB beneath the mature lithosphere is ~ 80–85 km in depth (Kawakatsu et al. Measuring Volume. re: how to reach standard if 2/4 or lower. Plate Tectonics. If the area shown in this figure is 240 kilometers wide, and the oldest crest is 4 million years old, what was the approximate rate of seafloor spreading across this ridge? ***photo of polarity. 3: How long/wide the is mid-ocean ridge system? Where is it located? It is 65000 km. How hot can sea water be heated to at the mid-oceanic ridges?. This versatile model is perfect for hands-on investigations in hydrography. •Neritic sediments cover about ¼ of the sea floor. symbolics-dk. Hess took rock samples close to the ridge and far from it. a (6-8 can be in any order) 6. , 2013) and Troodos (Mukasa and Ludden, 1987; Osozawa et al. Click on the distance tab in the upper left. Seafloor Ages. and virtual labs. On the ridge flanks the depth of the seafloor (or the height of a location on a mid-ocean ridge above a base-level) is correlated with its age (age of the lithosphere where depth is measured). Modelling Sea Floor Spreading Sea floor spreading is a process that describes how new oceanic crust forms at mid-ocean ridges. Earthquakes & Volcanoes. The diagram on the next page represents a section of the ocean floor in the North Atlantic. 1/Reading 2. Students at dozens of schools have started petitions calling for refunds as online classes left them underwhelmed. This is the case. Difficulties At the time this concept was pro-posed there was very little concrete evidence to support it, and in some ways it posed more problems than it solved. continental drift mid-ocean ridge sea-floor spreading paleomagnetism Evidence for continental drift was found in Earth’s natural magnetism. Perhaps this is a sign that full sea-floor spreading in Afar is imminent, at least on geological timescales. Colored pencils. Atlantic Sea-Floor Spreading Activity 2. The ocean floor spreading eastward is subducted and destroyed relatively soon after formation. The longest chain of mountains in the world is the mid-ocean ridge. This worksheet, completed. Age of rocks. Find two famous rift valleys. The strips of paper represent oceanic crust or seafloor. and Buffett, B. 11: Explain how HYDROTHERMAL Vents are formed:. If your teaching Seafloor Spreading, this is an EASY and FUN lab to do with your students!! This lab is a great way to get students actively engaged in hands-on, cooperative learning! After following the EASY step-by-step instructions, students answer questions (analyze & conclude worksheet attached) about the lab challenging them to think critically about the process of seafloor spreading. Lectures by Walter Lewin. "Sea Floor Ship" - Animated Desktop Wallpaper by EleFun Multimedia. Use this for #8 seafloor spreading in plate tectonics. Earth’s Interior & Plate Tectonics. FRIDAY: Today you are going to learn more about convection, which is the driving force behind seafloor spreading, which is how entire tectonic plates move. The distance between us and them: Sea floor spreading in the Atlantic Ocean 1. 2) Convection Current Drives Plate Motions Pg. This scenario would imply a duration of seafloor spreading at the low end of the range cited above. Explain when, where, what, how, and why it occurred. Is the idea that the continents are slowly drifting further away from each other. Here, magma rises up from. Convection Current Lab Week 3: Continental Drift Fossils and Pangaea Foldable Graham Cracker Plates Week 4: Sea-Floor Spreading Sea Floor Spreading Sheet Sea Floor Spreading Simon Says Sea Floor Spreading Lab Week 5: Plate Tectonics Graham Cracker Lab Week 6: Forces of Earth's Crust Fault Blocks Clay Faults Faults Foldable. The older rock is close to 400 million years. Some of the worksheets for this concept are Sea floor spreading work, Inside earth work, A model of seafloor spreading, Sea floor spreading, Name date sea floor spreading l 1 2 3, Continental drift sea floor spreading and plate tectonics, Lab work plate tectonics, Magnetic reversals activity. Peppered Moth Activity. For example, in the Atlantic. If the pulling con-. What has been the average rate and direction of seafloor spreading in cm per year (cm/yr) east of the Juan de Fuca Ridge, from B to C Show your work. Berdasarkan data-data topografi, sedimen dan paleomagnetisme bawah laut (lihat posting yang lalu), diajukanlah teori baru yaitu seafloor spreading. Most of the modern evidence for plate tectonics has been found in the ocean. If sea-floor spreading operates, the youngest oceanic crust should be found at the ridges and progressively older crust should be found in moving away from the ridges towards the continents. He made major contributions to the study of the oceanic lithosphere, including the concept that convection cells in the mantle were the driving force for seafloor spreading. "Geoworld" Plate Tectonics Lab 67 6. Understand how geomagnetic reversals provided evidence for sea-floor spreading. Seafloor Spreading Lab ANSWER KEY for UVMS Wednesday, January 22, 2014. mountain belts, and volcanoes, the shape of the sea floor, and the distribution of rocks and fossils can be seen. LAB 15 Sea Floor Spreading GENERAL SCIENCE 1110L LAB LAB 9: Sea Floor Spreading. View Lab Report - Sea Floor Spreading Lab 4-3. The Earth's magnetic field - invisible lines of magnetic force surrounding the earth deflect magnetized objects, such as compass needles, that are free to move. The tangible models help students grasp processes and information that would otherwise be difficult to visually showcase. Some of the worksheets for this concept are Sea floor spreading work, Inside earth work, Name date sea floor spreading l 1 2 3, A model of seafloor spreading, Sea floor spreading, Sea floor spreading, Modeling sea floor spreading, Chapter 8 plate tectonics. What does the rate of spreading dictate? The rate of spreading dictates the topography of the ridge. This shell is very thin compared to the size. The Ridge 2000 program is an interdisciplinary research program sponsored by the National Science Foundation that is focused on integrated studies of all aspects of the Earth's oceanic spreading centers - from mantle to microbe. On the ridge flanks the depth of the seafloor (or the height of a location on a mid-ocean ridge above a base-level) is correlated with its age (age of the lithosphere where depth is measured). Earthquakes & Volcanoes. 3 Spreading center. Sea-Floor Spreading Answer Key. Hess suggested that along the mid-ocean ridge, magma rises from the mantle and erupts. finish plate tectonics, convection currents, and the sea floor spreading and how the earth changes link for 1st and 2nd period 2. For more information on your notebook set and this lab please see the Notebook Setup Tab (*hint hint wink wink nod nod*)above. Nov 12 & 13 Daily Assignment. Show animation several times to increase understanding while discussing movement of ocean floor, what happens as it nears continents, etc. titanomagnetite to cation deficient titanomaghemite in pillow basalt exposed on the seafloor appears to be approximately z = 0. Didn’t advocate too strongly, for fear of ruining his career. Introduction to Plate Tectonics Oceanography EPSS 15 Fall 2017 Review from Lab 2 These plates are in constant motion driven by forces deep within the Earth Cool, rigid lithospheric plates “float”on hotter, more plastic region of the upper mantle, called asthenosphere. ; The regions that hold the unique record of earth's magnetic field lie along the mid-ocean ridges where the sea floor is spreading. finish Seafloor spreading article 3. F) Test product instructions on top of Tectonics Test Map, example entry on graphic organizer. virtual lab dynamic earth interactive - link link for questions. Whats people lookup in this blog: Sea Floor Spreading Lab Pdf; Seafloor Spreading Lab Pdf Answer Key. D) Seafloor spreading produces major characteristics of the seafloor: 1) The age of the seafloor is progressively _____ away from mid-ocean ridges. Although this process takes place constantly, it is difficult to observe directly. Seafloor Spreading. Virtual Reality Concert In Helsinki Attracts Over 1 Million Spectators Google Play has been spreading advanced Android malware for years Google’s medical AI. 2 labs have been set out for you to complete: Seafloor Spreading- Divergent Plate Boundaries and Sea Floor Spreading Student Activity Kit. Sea Floor Spreading Activity Sea Floor Spreading with Bill Nye Sea Floor Spreading This video goes over the process of sea floor spreading and the evidence that supports this theory. 1) Seafloor spreading adds crust, subduction gets rid of it 2) Seafloor spreading happens at mid-ocean ridges, subduction occurs at deep-floor trenches. On the map, rocks with reverse magnetic polarity are represented by white bands and those with normal polarity by gray If ocean-floor spreading produces symmetric magnetic anomaly patterns across a. Seafloor Spreading - Displaying top 8 worksheets found for this concept. View the interactive image by Joan Mylin. During the lab, perform from time to time a screen capture and print out the image for your notebook. 5 centimeters per year, is associated with a thin second. With the Sea Floor Spreading and Plate Tectonics Classroom Activity Kit for Earth science and geology, simulate the amazing process of sea floor spreading and continental drift over geological time. Shade them with a light. This process is called sea-floor spreading. The sea floors are growing. Moon Phase Lab. List them and write where they are located. com/college/geo/animations/magnetic_reversals. Because students choose different study sites, their answers will vary but should fall within the range of a 9-12km/My half-rate. China's priority is. In this investigation, you will work with your classmates to develop a model that shows how sea floor spreading occurs. Paleomagnetism: Strong evidence of Seafloor Spreading and Plate Tectonics. Part 1: Looking at key evidence discovered in the 1960s that solidified the seafloor spreading theory. Seafloor Spreading Lab ANSWER KEY for UVMS Wednesday, January 22, 2014. This site from the University Corporation for Atmospheric Research (UCAR) offers an interactive simulation that shows how magnetic stripes on the ocean bottom can reveal the age of the material and reveal plate motion. CW: Finished Features of the Ocean Floor Virtual Lab HW: Complete Journal Questions for Virtual Lab --> due Friday Wednesday: CW: 1-5 Plate Tectonics, Read/Notes pg. The oldest sections should be the sections on both sides furthest from the middle 4. Older crust is destroyed near the edges of oceans, where plates collide and one subducts (dives) below the other and melts. There were, for example, at least three rather awkward points that it did notexplain:. Click on the distance tab in the upper left. Using the foldables, explain what seafloor spreading is, where it occurs, and what it causes (use the passage!). animation III. Virtual Reality Concert In Helsinki Attracts Over 1 Million Spectators Google Play has been spreading advanced Android malware for years Google’s medical AI. LAB 15 Sea Floor Spreading GENERAL SCIENCE 1110L LAB LAB 9: Sea Floor Spreading. Displaying top 8 worksheets found for - Sea Floor Spreading Answer Key. Gallian Ch 9-11 Summary Essentials Of Comparative Politics - chapters 1-11 Summary Media And Culture: Mass Communication In A Digital Age - Chapters 5-10 Bathymetry Template - Lab 1 Matter and Energy Transfer Measurement Template - Lab 3. 2 labs have been set out for you to complete: Seafloor Spreading- Divergent Plate Boundaries and Sea Floor Spreading Student Activity Kit. In the case of divergent plate boundaries, where plates are spreading away from each other, the rate of plate movement plays an important role in determini. Bathymetric Evidence for Seafloor Spreading; Magnetic Evidence for Seafloor Spreading; Seafloor Spreading Hypothesis. ” 1 What Hess put together was a mass of seemingly unrelated data when he proposed his seafloor spreading hypothesis. Since sea-floor spreading is a continuous process on a geological timescale, the process preserves rocks of alternating polarity across the ocean floor (Figure 7a). The under water topography maps have been developed by the study of ocean floor topography. What was the depth and magnitude of the earthquake? What was the death-toll? Were there any mitigation efforts?. You can build a model to help understand this process. 20 Plate Tectonics. The beginning of the Paleozoic was marked by the evolution of marine organisms that could take calcium. • Explain the significance of magnetic patterns on the seafloor. Seafloor spreading: Image from interactive diagram by Earthguide at Scripps Institution of Oceanography. So, if you’d like to secure the fantastic photos regarding (4 Sea Floor Spreading. the 2nd evidence of seafloor spreading. Magnetic Striping of the Sea Floor After mid-ocean ridges and trenches were discovered, more evidence was discovered that helped to support the theory that the continents had moved around. An example is the Mid-Atlantic Ridge. The oldest known ocean floor is dated at about 200 million years, indicating. Seafloor Spreading Section Objectives • Summarize the evidence that led to the discovery of seafloor spreading. WTT, Students reviewed sea floor spreading. What they discovered was the mid-ocean ridge was actually a site where tectonic plates, which are large pieces of the earth's crust, were pulling apart from. 132 – 133: Plate Tectonics Theory. Sea level (0 meters) is the line already shown on the graph. a (6-8 can be in any order) 6. 2 pieces of paper (11x17 or 8. Magnetic stripes on the ocean floor: a lab simulation Learning objectives: the Earth’s magnetic field has ‘flipped’ (the N pole becoming the S pole, and vice versa) many times over geological time ; as tectonic plates move apart, new rock is formed and locks in the direction of the magnetic field at the time. Here, magma rises up from below as the sea floor spreads out to either side as shown in Figure 1. (The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid-ocean ridge is the spreading half-rate and is equal to half of the spreading rate). Seafloor Spreading - Displaying top 8 worksheets found for this concept. Geology 101 Lab: Plate Tectonics Goals of this lab: -to learn about types of Plate Boundaries -to learn about Plate Boundary Interactions to the "Seafloor Spreading" picture and click on the picture. The pattern of sea floor spreading can be observed by studying the magnetic field of the rock on the sea floor. 1/23/2020 See yesterday's post for Periods: 3, 5, and 6. Based on the distribution of color on the map, which ridge is spreading faster, the Mid-Atlantic Ridge or the East Pacific Rise (ridge and rise are both nicknames for a mid-oceanic ridge)? Check Answer. Perhaps this is a sign that full sea-floor spreading in Afar is imminent, at least on geological timescales. Plate Tectonics gr 6 link. Seafloor Spreading. Lecture #26: Rock Magnetism and Sea-floor Spreading. The moon would be waning when it is appears to be getting smaller, when it is "losing" light, therefore we don't see it as much, until it is a new moon. Get Started. If your teaching Seafloor Spreading, this is an EASY and FUN lab to do with your students!! This lab is a great way to get students actively engaged in hands-on, cooperative learning! After following the EASY step-by-step instructions, students answer questions (analyze & conclude worksheet at. A) prettier B) newer C) younger D) older E) rockier 13. (Japan) _____ 4. Due by the time the next lab begins next week: 1. Sea Floor Spreading occurs at the mid-ocean ridge where two plates are moving away from each other. Today you are going to learn more about the ocean floor. Seafloor Spreading (Earth Science Indicator #9 – Describe the interior and structure of Earth and Earth’s crust as divided into tectonic plates riding on top of slow moving currents of magma in the mantle) (Earth Science Indicator #11 – Use models to analyze the size and shape of Earth, its surface and its interior[e. Unit 1: Seafloor Spreading and Uniformitarianism Laboratory 1. The magnetism of mid-ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century. Lab Seafloor Spreading Rates 3 Theory of Plate Tectonics Lab Predicting Tectonic Activity Virtual Lab Where do most earthquake epicenters and volcanoes occur? [Filename: 46176907. A related activity — Erickson, S. Here, magma rises up from below as the sea floor spreads out to either side as shown in Figure 1. (*)You have two days to complete this lab on Mapping the Ocean Floor. GENERAL SCIENCE 1110L LAB LAB 9: Sea Floor Spreading. Cut along the dotted lines of the sea-floor spreading model pattern. Magma (hot molten underground rock material) rises up into the. a (6–8 can be in any order) 6. As two tectonic plates slowly separate, molten material rises up from within the mantle to fill the opening. Plate tectonics is the combination of the seafloor spreading and continental drift. Using the magnetic anomaly patterns in the Aragorn Ocean, determine when sea floor spreading started to form the Aragorn Ocean crust (remember, spreading is not actively going on now but it was at one time). Age of rocks the 1st evidence of seafloor spreading Convergent plate boundaries the sites where 2 plates are moving toward each other and the motion is accommodated by one plate sliding beneath the other. They also look at how volcanoes and earthquakes are explained by tectonic plate movement, and how engineers use this information. Part 1 - The Atlantic Ocean (1) The major topographic feature of the Atlantic Ocean floor is called the _____. and Conrad, C. 4-2 Name_____KEY_____ Lab Day/Time_____ Pre-lab Questions - Complete these questions before coming to lab. An Interactive Global Map of Sea Floor Topography Based on Satellite Altimetry & Ship Depth Soundings Meghan Miller, Walter H. cut paper along. Sea floor spreading simulation Name: _____ Get a piece of paper and fold it in half hotdog style. The Solar System. Drilled Rock Samples-shows the age of the rocks 3. Examrace 88,837 views. Earth History Lab - Duration: 12:20. volcanic islands 7. Topographic maps are used to provide information about different land elevations. Sediment Deposition Supports Seafloor Spreading — Student Guide 3 What To Do 1 The gray circles on the map represent drill sites where the JOIDES Resolution collected sediment cores from the ocean floor during Ocean Drilling Program (ODP) expedition 168 in 1996. Drag the compass across the mid ocean ridge and observe where the magnetism of the rock reverses. What happens when a tectonic plate gets subducted? It melts into magma 2. F) Test product instructions on top of Tectonics Test Map, example entry on graphic organizer. QUIZ #2 (Covers Labs 1 and 2 & Sea Floor Topography from lecture). net Seafloor Spreading Annotated Teacher Edition from sea floor spreading worksheet , source:studylib. " Bell Work 1/17: In your own words, explain how each piece of evidence supports the Theory of. Lab 2 Activities. icebreaker Healy found evidence from water samples and seafloor rocks of far more volcanism and hydrothermal venting than was predicted on the ultra-slow-spreading Gakkel Ridge in the Arctic Ocean. The profiles were measured by a ship that crossed the ridge in four places. pdf: File Size: 49 kb: File Type: pdf: Download File. Students will understand how plate tectonics creates certain geologic features, materials, and hazards. Lab Investigation Modeling Sea-Floor Spreading Reviewing Content Mid-ocean ridges are long, underwater mountain chains that rise up from the ocean floors. If the pulling con-. The seafloor spreading hypothesis was proposed by the American geophysicist Harry H. Activity #4. Rotation 2 (Tuesday)→ Sea Floor Spreading Activity Virtual Trip across the Atlantic (Step by Step section 2) in lab 108 HW: Topography graph on the Depth of the Atlantic is due Wed. For example, every million years the Earth's magnetic poles tend to reverse 4 or 5 times. The sea floors are growing. View Lab Report - Sea Floor Spreading Lab 4-3. When echo sounding devices were invented, detailed maps could finally be drawn. The small but spreading movement drew encouragement from Trump, who tweeted that three states should be "liberated" from the stay-home orders. Sea-Floor Spreading. All models. Sea-Floor Spreading Lab INTRODUCTION In the late 1950s, considerable research was conducted to find a means of detecting large steel objects beneath the ocean surface (submarines). Because the oldest sea floor shown on the map is 156 million years old, it is best to calculate an average spreading rate over some time period longer than about 50 million years. Chapter 10 Virtual Lab. Study the map carefully and answer the questions below. Activity of the Month Activity of the Month - June, 2008 Plate Tectonics and Contributions from Scientific Ocean Drilling Summary In this activity. To reduce the potential for spreading infectious diseases like COVID-19, UHN is piloting an enhanced virtual care system to minimize person-to-person contact. Sea floor spreading occurs at the mid-ocean ridge where two plates are moving away from each other. Lab Procedures. Based on the distribution of color on the map, which ridge is spreading faster, the Mid-Atlantic Ridge or the East Pacific Rise (ridge and rise are both nicknames for a mid-oceanic ridge)?. This spreading occurs at about the same rate as your fingernails grow. Modeling Sea Floor Spreading Lab (pdf or google doc) Sea Floor Spreading Article (pdf or google doc) Pangea Puzzle Playdough Plate Tectonics Activity (pdf or google doc) Layers of the Earth & Plate Tectonics Homework Packet - collected February 12th, 2013 Guided Reading: Layers of the Earth (pdf or google doc) Guided Reading: Continental Drift. The profiles were measured by a ship that crossed the ridge in four places. What has been the average rate and direction of seafloor spreading in cm per year (cm/yr) east of the Juan de Fuca Ridge, from B to C Show your work. Rock samples. So check your life vest, pick Harry Hess’s Concept of Sea Floor Spreading. Showing top 8 worksheets in the category - Seafloor Spreading. Students will understand how plate tectonics creates certain geologic features, materials, and hazards. The reason for this is that the lithosphere is essentially "floating on the asthenosphere. Most basalt magmas contain abundant molten iron. Kristina Adams Waldorf redirected her lab’s focus from Zika toward the effect of COVID-19 on pregnant women. Displaying all worksheets related to - Seafloor Spreading. SEA-FLOOR SPREADING MODEL LAB. , Helling, F. Seafloor Spreading Hypothesis. Scores of schools have returned portions of housing and dining fees, but few if any have agreed to return any share of tuition. Sea-Floor Spreading Application Main Window: North East Pacific Magnetic Stripes: Age Map of the Ocean Floor: Quicktime Movies: Seafloor Spreading – Bathymetry backward in time bathy_b. Abyssal Plain: An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Seafloor spreading processes create new oceanic crust at mid-ocean ridges and destroy older crust at deep sea trenches. One of the areas includes the Tonga Islands in the southwest Pacific Ocean. Activities include dating the initiation of sea-floor spreading, determining the sense of offset on transform faults. Smith, John Kuhn, & David T. The purpose of this lab is to have you utilize the age and positions of rock formations associated with the Mid Atlantic Ridge to support the hypothesis of sea floor spreading. A Model of Seafloor Spreading KEY 1. If the ridge is slowly growing, it shows a steep and irregular topography, and is narrow. Displaying all worksheets related to - Seafloor Ages. Color the areas indicated on the two strips with crayons or colored pencils. COVID-19 has seen to that. Review Questions [ edit ] Describe how sound waves are used to develop a map of the features of the seafloor. , Helling, F. Chapter Lab Investigation: • Directed Inquiry: Modeling Sea-Floor Spreading Open Inquiry: Modeling Sea-Floor Spreading Inquiry Warm-Ups: • How Are Earth’s Continents Linked Together? • What Is the Effect of a Change in Density? • Plate Interactions Quick Labs: • Moving the Continents • Mid-Ocean Ridges • Reversing Poles. G) Include labs detailed below in your test pack as ordered on this page:. ‪Energy Skate Park: Basics‬ 1. In seafloor spreading, the further the ocean floor is away from the mid-ocean ridge, the _____ that floor will be. Lab: Micro-Fossils and Sea-Floor Spreading Background: Foraminifera and Radiolarian videos with class discussion Lab: Microfossils, Sediments and Sea-Floor Spreading Extension Video: A Forams Tale (documentary) Lab: Stratigraphy Pre-Lab: connections to college geology and identifying what we want to learn Lab: Geologic Time -Stratigraphy. The profiles were measured by a ship that crossed the ridge in four places. 2 This hypothesis had more to do with the eventual acceptance of continental drift theory in the form of plate tectonics by most researchers in the geosciences during the late sixties than any. (long ways) Then open it up and draw patterns of color across the paper in varying sizes. (when the red triangle flips up or down) Draw the ruler on the ocean floor on your paper. For background, go to the Basics page on Plate Tectonics/Paleomagnetism. This theory also says that most of these plates are in motion, creating. Give one example of how subduction is different than sea-floor spreading 1) Seafloor spreading adds crust, subduction gets rid of it 2) Seafloor spreading happens at mid-ocean ridges, subduction occurs at deep-floor trenches. -Williams-Plate-Tectonics-Boundaries-Sea-Floor-Spreading-and-Continental-Drift-Guided-Notes Take 1 Plate Tectonics Power Point Guided Notes This entry was posted in Uncategorized on February 6, 2020 by spwillia. They also look at how volcanoes and earthquakes are explained by tectonic plate movement, and how engineers use this information. What has been the average rate and direction of seafloor spreading in cm per year (only) west of the Juan de Fuca Ridge, from B to A show your work 3. Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. The ocean floor spreading eastward is subducted and destroyed relatively soon after formation. Harry Hess proposed the ideas of sea floor spreading. This forms a narrow valley (called a fissure) and molten rock, or lava, will rise. The subducted plate melts and molten rock rises and breaks through the sea-floor producing a string of undersea volcanoes that may, in time, rise above the oceans surface. When echo sounding devices were invented, detailed maps could finally be drawn. During sea-floor spreading, two tectonic plates move apart, forming a crack. January 1, 2018. For background, go to the Basics page on Plate Tectonics/Paleomagnetism. symbolics-dk. 139 Summary of the Theory that Replaced the Continental Drift Theory. Because the oldest sea floor shown on the map is 156 million years old, it is best to calculate an average spreading rate over some time period longer than about 50 million years. Buss Earth Science Farmington High School Lab 5 Sea Floor Spreading. Climate and Changes in Sea Level. 9: What does the rate of spreading dictate? Influences the topography of the ridge. Hess in 1960. Give one example of how subduction is different than sea-floor spreading 1) Seafloor spreading adds crust, subduction gets rid of it 2) Seafloor spreading happens at mid-ocean ridges, subduction occurs at deep-floor trenches. Evidence for Sea-Floor Spreading. Sea Floor Spreading Notes. Seafloor Spreading Hypothesis. It is here where deep, still-molten magma may be powering active vents. 12/3: Section 3. The ocean floor spreading eastward is subducted and destroyed relatively soon after formation. You will recall from a previous chapter that there are three major layers (crust, mantle, core) within the earth that are. 1) What feature of the ocean floor is shown at A? 2) Describe the process shown occurring at B, and explain what results from this. Color the areas indicated on the two strips with colored pencils. 2, asked by Wolf on October 4, 2017; science. Sea Floor Spreading occurs at the mid-ocean ridge where two plates are moving away from each other. What has been the average rate and direction of seafloor spreading in cm per year (only) west of the Juan de Fuca Ridge, from B to A show your work 3. GENERAL SCIENCE 1110L LAB LAB 9: Sea Floor Spreading. For more information on your notebook set and this lab please see the. p17-19 and Chapter 12 p. When echo sounding devices were invented, detailed maps could finally be drawn. Chapter Lab Investigation: • Directed Inquiry: Modeling Sea-Floor Spreading Open Inquiry: Modeling Sea-Floor Spreading Inquiry Warm-Ups: • How Are Earth’s Continents Linked Together? • What Is the Effect of a Change in Density? • Plate Interactions Quick Labs: • Moving the Continents • Mid-Ocean Ridges • Reversing Poles. pdf; Click here for Curriculum Night powerpoint for general. Lectures by Walter Lewin. Plate Tectonics Includes: Reproducible Student Pages ASSESSMENT Chapter Tests Chapter Review HANDS-ON ACTIVITIES Lab Worksheets for each Student Edition Activity Laboratory Activities Foldables-Reading and Study Skills activity sheet MEETING INDIVIDUAL NEEDS Directed Reading for Content Mastery. Grading Policy Update: Between now and the end of the semester, I will continue to enter grades into the Infinite Campus gradebook as usual, so your grade may fluctuate. Sea-floor Spreading Objective Students will construct a paper model to illustrate how the seafloor is created at mid-ocean ridges and is removed where it descends into trenches. Sea-Floor Spreading Answer Key. Get Free Access See Review. Children have the opportunity to work on their own earthquake model to help spur better understanding of earthquakes. Essentia offers the option in response to patients, who liked the convenience and safety of the virtual visits but wanted reassurance from the heartbeat and ultrasound monitoring, she said. 139 Summary of the Theory that Replaced the Continental Drift Theory. Mid - Oceanic Ridge 2. • Rift valleys are deep faulted structures found along the axes of divergent plate boundaries. This is the case. re: how to reach standard if 2/4 or lower. Some of the worksheets displayed are Sea floor spreading work, Inside earth work, A model of seafloor spreading, Sea floor spreading, Name date sea floor spreading l 1 2 3, Continental drift sea floor spreading and plate tectonics, Lab work plate tectonics, Magnetic reversals activity. This can result in an ever-widening seafloor at the. masking tape. Continental Drift and the Changing Oceans The Record in the Sediments. Seafloor bathymetry provides a roadmap that greatly narrows our search by identifying the path along the seafloor where the most recent seafloor spreading is occurring. Where can you find the data about each peak that you need for this lab? 2. Finish your ocean floor map graph and analysis. Ocean Depth (y-axis) for the Atlantic Profile graph. National Science Content Standards: UCP. This indicates how strong in your memory this concept is. Mid-Ocean Ridges form 2. The process is continuous because forces cause opposite sides of the midocean ridge to constantly move apart, making new room for the process to repeat. Sea-Floor Spreading Lab INTRODUCTION In the late 1950s, considerable research was conducted to find a means of detecting large steel objects beneath the ocean surface (submarines). View Lab Report - Unit 1- Seafloor Spreading and Uniformitarianism Laboratory. Lab: Sea Floor Spreading. Spreading rates determine if the ridge is fast, intermediate, or slow. Sea Floor Spreading occurs at the mid-ocean ridge where two plates are moving away from each other. Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Mid - Oceanic Ridge 2. pdf: File Size: 49 kb: File Type: pdf: Download File. Testing for Covid-19 so far has usually involved nose or throat swab samples. Plate Tectonics. To create a working model of sea floor spreading, follow the model seen below (Figure 1). SEA-FLOOR SPREADING MODEL LAB. Subduction is the process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle. What feature is formed at the ocean along the subduction zone?. their observations. Plate tectonics is the combination of the seafloor spreading and continental drift. Seafloor Spreading. Simulate and learn about the natural geological occurrences common on Earth with the geology models. "Sea Floor Ship" - Animated Desktop Wallpaper by EleFun Multimedia. Lab: Micro-Fossils and Sea-Floor Spreading Background: Foraminifera and Radiolarian videos with class discussion Lab: Microfossils, Sediments and Sea-Floor Spreading Extension Video: A Forams Tale (documentary) Lab: Stratigraphy Pre-Lab: connections to college geology and identifying what we want to learn Lab: Geologic Time -Stratigraphy. Sea-Floor Spreading Answer Key. This can result in an ever-widening seafloor at the. students will use actual data from historic oceanographic cruises to examine sea floor spreading. sea floor spreading worksheet pdf 28 images jesei seafloor from Sea Floor Spreading Worksheet, source:africaaction. Video: Making of the Fittest: Natural Selection & Adaptation. CW: Finished Features of the Ocean Floor Virtual Lab HW: Complete Journal Questions for Virtual Lab --> due Friday Wednesday: CW: 1-5 Plate Tectonics, Read/Notes pg. Scores of schools have returned portions of housing and dining fees, but few if any have agreed to return any share of tuition. pdf] - Read File Online - Report Abuse. Climate and Changes in Sea Level. What are the moon's 8 phases of the lunar cycle? *Draw and label the moon's phases with the position of the sun being to the right of the pages. The age, spreading rate, and asymmetry at each grid node are determined by linear interpolation between adjacent seafloor isochrons in the direction of spreading. 5: Explain how ridges form: Lava flows into the valley formed by a divergent boundary. -Williams-Plate-Tectonics-Boundaries-Sea-Floor-Spreading-and-Continental-Drift-Guided-Notes Take 1 Plate Tectonics Power Point Guided Notes This entry was posted in Uncategorized on February 6, 2020 by spwillia. Working in pairs, students think like engineers and connect what they. Sea floor spreading occurs at the mid-ocean ridge where two plates are moving away from each other. " Bell Work 1/17: In your own words, explain how each piece of evidence supports the Theory of. Seafloor Spreading Tutorial sea floor spreading slip slide collide Sea Floor Spreading Sea Floor Sp/edpuzzle. The Dynamic Mantle. Plate tectonics - Plate tectonics - Seafloor spreading: As upwelling of magma continues, the plates continue to diverge, a process known as seafloor spreading. Sea floor spreading is a process that occurs mid-ocean ridges, where new oceanic crusts is formed through volcanic activity and then gradually moves away from the ridge. Although this process takes place constantly, it is difficult to observe directly. Seafloor Spreading Calculator This "Seafloor Spreading Rates Calculator" calculates the spreading rate at any point on mid-ocean ridges. But that doesn’t mean executives and staff at the. Uncover the evidence for sea-floor spreading. The oldest known ocean floor is dated at about 200 million years, indicating. This spreading occurs at about the same rate as your fingernails grow. SONAR SOund Navigation And Ranging (Science starting working on the idea around 1914 and perfected it around the 1930- 1940. The width and length of the base are not critical, as long as they are. Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. animation III. The ocean floor spreading eastward is subducted and destroyed relatively soon after formation. volcanic mountains (9-10 can be in any order) 9. Plates I Activity 2: Magnetic Reversals and Sea Floor Striping Name: Lab Section: Date: Figure 1 shows the ocean floor around a spreading ridge. Here, magma rises up from. Seafloor Spreading Section Objectives • Summarize the evidence that led to the discovery of seafloor spreading. on StudyBlue. Magnetic Stripes-bands of magnetite that are lined up towards the magnetic north pole. China will not invite international experts to investigate the source of COVID-19 until the "final victory" over the virus, Beijing's UN ambassador in Geneva said Wednesday. GENERAL SCIENCE 1110L LAB LAB 9: Sea Floor Spreading. Kristina Adams Waldorf redirected her lab’s focus from Zika toward the effect of COVID-19 on pregnant women. Slow spreading, away from the ridge center at 1 to 2 centimeters per year, is associated with a thick second layer, a central rift, and adjacent rift mountains. On the ridge flanks the depth of the seafloor (or the height of a location on a mid-ocean ridge above a base-level) is correlated with its age (age of the lithosphere where depth is measured). 19 - PhET: Free online. Hot, molten rock is forced upward toward the seafloor at a mid-ocean ridge. Sea-Floor Spreading Application Main Window: North East Pacific Magnetic Stripes: Age Map of the Ocean Floor: Quicktime Movies: Seafloor Spreading – Bathymetry backward in time bathy_b. FOLLOW DIRECTIONS ON TABLE! Station #3: Survey & Plate Tectonics Versatile. One of the areas includes the Tonga Islands in the southwest Pacific Ocean. You can build a model to help understand this process.